Oxyfluorfen the most cost-effective herbicide
What is oxyfluorfen (42874-03-3)?
The pesticide and herbicide oxyfluorfen is an organic compound with the molecular formula C15H11ClF3NO4. Cas 42874-03-3 White to orange or red-brown crystalline solid with a smoke-like odor. Oxyfluorfen is a diphenyl ether herbicide and a protoporphyrinogen oxidase (PPO) inhibitor. It mainly has a contact killing effect. Most of it enters the plant through the coleoptile and mesocotyl, and there are also extremely Trace amounts are transported upward through the roots and enter the leaves. Its mechanism of action is to destroy the permeability of cells, promote the release of ethylene, disrupt cell physiological functions, accelerate aging, cause leaves or young shoots to wilt, and eventually fall off and die.
The density of the herbicide oxyfluorfen is 1.402 g/cm3, the melting point is 83-84°C, the boiling point is >240°C, the flash point is -18°C, and the refractive index is 1.536. It is prepared by using 3,4-dichlorotoluene and resorcinol as raw materials through chlorination, fluorination, etherification, nitration, alcoholysis and other reactions.
The pesticide oxyfluorfen is a fluorophenyl ether herbicide, and its herbicidal activity is 5-10 times higher than that of the corresponding herbicidal ether. Wide range of use, broad herbicidal spectrum, long duration of effect, low dosage per mu, high activity, can be used in combination with a variety of herbicides to expand herbicidal spectrum, improve efficacy, easy to use, can be used for pre-emergence treatment, It can also be treated after sprouting and has low toxicity. It is a selective pre-emergence or post-emergence herbicide.
Mechanism of action of oxyfluorfen (42874-03-3)
The pesticide oxyfluorfen is a contact herbicide. It exerts its herbicidal activity in the presence of light. It mainly enters the plant through coleoptiles and mesocotyls, is absorbed less through the roots, and a very small amount is transported upward through the roots into the leaves.
Product features of oxyfluorfen (42874-03-3)
1. The effect is best when applied before weeds emerge and early after they emerge.
2. The duration of effect is longer than that of general soil treatment agents and post-emergence directional spray agents. It is suitable for soil sealing treatment in a variety of crop fields to prevent annual weeds and only inhibits perennial weeds. Directional spraying can be done early after weeds emerge.
3. It has high activity, small dosage and low cost when used. At the same time, attention should be paid to controlling the dosage, otherwise it is easy to cause phytotoxicity.
4. Strong complementarity with other herbicide products. Oxyfluorfen can control both gramineous weeds and broadleaf weeds. Its herbicidal spectrum against gramineous weeds is not as good as that of pendimethalin, but it has low control effect against pendimethalin on shepherd's purse, Artemisia spp. Sodium is especially efficient. Therefore, the mixed use of the two can control a variety of weeds in one application. If amide herbicides are used alone for a long time, the number of broadweeds cannot be controlled, and oxyfluorfen is effective in controlling broadweeds. Excellent, used in combination with amides, it can effectively deal with grass and sedge.
5. Good mixability and wide range of use. When applied in rice fields where grasses and sedges grow, it can be mixed with oxadiazon, acetochlor, etc.; when applied in soybean, peanut, cotton fields, etc., it can be mixed with alachlor, trifluralin, etc.; in orchards, etc. Medicine, can be mixed with paraquat and glyphosate.
Function of oxyfluorfen (42874-03-3)
The pesticide oxyfluorfen is a selective pre-emergence or post-emergence herbicide. Oxyfluorfen is a contact herbicide. It exerts its herbicidal activity in the presence of light. It mainly enters the plant through the coleoptile and mesocotyl, is absorbed less through the roots, and a very small amount is transported upward through the roots into the leaves.
The herbicide oxyfluorfen is used for pre- and post-emergence applications on cotton, onions, peanuts, soybeans, sugar beets, fruit trees and vegetable fields to control barnyardgrass, sesbania, bromus, setaria, datura, and creeping wheatgrass. , ragweed, goldenrod, amaranth, dogtail, cotyledonous and broad-leaf weeds. It is very resistant to leaching. Can be used as cream.
The herbicide oxyfluorfen can control monocotyledonous and broadleaf weeds in transplanted rice, soybeans, corn, cotton, peanuts, sugar cane, vineyards, orchards, vegetable fields and forest nurseries. When spraying on upland rice, it can be mixed with butachlor; when spraying on soybean, peanut, cotton fields, etc., it can be mixed with alachlor, trifluralin, etc.; when spraying on orchards, etc., it can be mixed with paraquat and glyphosate .
Oxyfluorfen (42874-03-3) uses
The herbicide oxyfluorfen is used for pre- and post-emergence applications on cotton, onions, peanuts, soybeans, sugar beets, fruit trees and vegetable fields to control barnyardgrass, sesbania, bromus, setaria, datura, and creeping wheatgrass. , ragweed, goldenrod, amaranth, dogtail, cotyledonous and broad-leaf weeds. It is very resistant to leaching. Can be used as cream.
The herbicide oxyfluorfen can control monocotyledonous and broadleaf weeds in transplanted rice, soybeans, corn, cotton, peanuts, sugar cane, vineyards, orchards, vegetable fields and forest nurseries. This ingredient can be compounded with various ingredients such as pretilachlor, oxadiazon, ciclofen, pyrimisofen, pendimethalin, metolachlor, atrafenazine, glufosinate-ammonium and other ingredients.
1. The herbicide oxyfluorfen is a low-toxic, contact herbicide. It exerts its herbicidal activity in the presence of light. It has the best effect when applied before and early after emergence. It has a broad spectrum of herbicides on weeds that germinate from seeds. It can control broadleaf weeds, sedges and barnyardgrass, but it has an inhibitory effect on perennial weeds. Control objects: It can control monocotyledonous and broad-leaf weeds in transplanted rice, soybeans, corn, cotton, peanuts, sugar cane, vineyards, orchards, vegetable fields and forest nurseries.
2. The herbicide oxyfluorfen belongs to the fluorinated diphenyl ethers. It is an ultra-low dosage, selective, pre- and post-emergence contact herbicide. Weeds are mainly killed by absorbing the agent through coleoptiles and mesocotyls. It is suitable for rice, soybeans, wheat, cotton, corn, oil palm, vegetables and orchards, etc. to control broadleaf weeds and certain grass weeds, such as commelina, barnyardgrass, sedge, sesbania, brome, Datura, etc., the dosage is 1~2g active ingredient/100m2. For example, 4 to 6 days after rice transplantation, when barnyard grass is at the bud stage to 1.5 leaf stage, use 1.5 to 2.3 mL/100m2 of 24% EC to make poisonous soil and spread it evenly. 0.5% granules can also be used for broadcasting. It is used for pre-emergence spraying of crops such as soybeans and cotton after sowing. Use 24% EC 7.5mL/100m2 and spray the water evenly on the soil surface.
How to use oxyfluorfen (42874-03-3)
1. As a pre-emergence soil treatment, it has a high control effect on annual broadleaf grasses, sedges and grasses, and the control effect on broadleaf grasses is higher than that of grasses. It is complementary to amide herbicides, so in areas where amide herbicides have been used alone for a long time, it is an ideal choice to promote oxyfluorfen or its mixture.
2. The pre-emergence treatment of oxyfluorfen is a selective herbicide, and the early post-emergence application is a biocidal herbicide. It can effectively control various annual weeds at appropriate dosages. Therefore, directional spraying at the right time after corn seedlings can not only kill a variety of broad-leaf weeds, sedges, and grasses that have been unearthed, but also have a good soil sealing effect, so its duration is longer than that of general soil treatment agents. And post-emergence directional spraying agent has good weeding effect. Because it has no systemic conduction effect, the drift damage to corn is easy to control and recovers quickly, so it can be used for weeding in various orchards.
3. Oxyfluorfen is a herbicide specific to Stephania chinensis, with low dosage and low cost. At the same time, because of its broad spectrum of killing weeds, one application can also solve the damage of other weeds in rice fields. In view of the extremely low water solubility of oxyfluorfen, the practice of "applying the pesticide after soil preparation and transplanting the rice seedlings one day later" can reduce the phenomenon of "seedling burning" to a large extent.
4. Selective pre-emergence or post-emergence herbicide. Used for pre-emergence and post-emergence application in cotton, onion, peanut, soybean, sugar beet, fruit tree and vegetable fields to control barnyard grass, sesbania, bromus, setaria, datura, creeping iceweed, ragweed, and goldenrod. , amaranth, tagisserie, cotyledonous and broad-leaf weeds.
5. The herbicide oxyfluorfen can control monocotyledonous and broad-leaf weeds in transplanted rice, soybeans, corn, cotton, peanuts, sugar cane, vineyards, orchards, vegetable fields and forest nurseries. When spraying on upland rice, it can be mixed with butachlor; when spraying on soybeans, peanuts, cotton fields, etc., it can be mixed with alachlor, trifluralin, etc.; when spraying on orchards, etc., it can be mixed with carboxon, glyphosate Mix it up. If the rice field encounters heavy rain after applying pesticides, the water will flood the heart of the seedlings, which will cause the seedlings to die due to pesticide damage. At this time, the exit of the field ridge should be made flat to control the water layer. After the garlic field is closed and sprayed, if there is heavy rain or long-term rain, the newly sprouted garlic will appear distorted and white, but it will resume growth after 1 week.
Usage scope of oxyfluorfen (42874-03-3)
1. Peanuts
1. Applicable dosage: 30~40ml/mu.
2. Time of use: after sowing and before emergence.
3. How to use: Mix 50 liters (kg) of water per acre and spray evenly.
4. Application conditions: After sowing, cover the seeds tightly, prepare the soil carefully, and break up large soil clods.
5. Mixed use: 20 ml of oxyfluorfen + 80 ml of 50% acetochlor/mu.
6. Note: Peanuts cannot be used after they are unearthed.
2. Green onions and onions
1. Applicable dosage: 30~40ml/mu.
2. Usage time: Within 3 days after transplanting and planting. Sow green onions or onions at the 3-leaf stage and weeds before the 4-leaf stage.
3. How to use: Mix 50 liters (kg) of water per acre and spray evenly.
4. Operation process: soil preparation--transplanting and planting crops--application of pesticides--complete.
5. Application conditions: after the 3-leaf stage of green onions and onions, and before the 4-leaf stage of weeds. The soil should be moist.
6. Note: Small white spots will appear on the onion tubes after application, but it will not affect growth and final yield.
3. Garlic and ginger
1. Applicable dosage: 30~40ml/mu.
2. Application time: after sowing but before seedling emergence; or after the 3-leaf stage of garlic and before the 4-leaf stage of weeds.
3. How to use: Mix 50-60 liters (kg) of water per acre and spray evenly.
4. Operation process: soil preparation and border construction--planting--application of pesticides--complete.
5. Medication conditions: Cover with soil after sowing, and then apply the medication. The soil must be moist.
6. Precautions: Use after sowing but before emergence; if used after garlic emergence, it must be used after the 3-leaf stage and before the 4-leaf stage of weeds. Ginger can also be sprayed directionally between rows after the seedlings are 40 cm high, so that the soil cannot be disturbed after spraying.
4. Plastic film covering transplanted crops (vegetables, melons, tobacco, strawberries, leguminous crops, etc.)
1. Applicable dosage: 30~40ml/mu.
2. Application time: Spray evenly on the border surface before covering the film.
3. How to use: Mix 50 liters of water per acre and spray evenly.
4. Operation process: Apply pesticide--cover with film--punch holes--transplant and plant crops--complete.
5. Soil conditions: The border surface should be flat, without large soil clods, and the soil should be moist.
6. Precautions: Do not apply pesticides after crops are planted.
5. Vineyards and orchards
1. Treatment of weeds before germination or early after germination (before the 4-leaf stage):
(1) Medication dosage: 30~40 ml/mu.
(2) Time of use: before weeds sprout and are unearthed.
(3) How to use: Mix 50 liters of water per acre and spray evenly.
(4) Soil conditions: The ground surface should be moist, and the effect of pesticide application will be best after light rain or just after watering the ground.
(5) Note: Do not spray on fruit trees.
2. Treatment of weeds after the 6-leaf stage:
(1) Applicable dosage: 4 ml of oxyfluorfen + 200 ml/bottle of glyphosate 41% aqueous solution.
(2) Time of use: Weed growth period.
(3) How to use: Mix 30 to 40 liters of water per acre and spray evenly.
(4) Precautions: When mixed with Chunduoduo and mowing grass, it must be prepared and used immediately.
6. Forest Nursery
1. Newly sown conifer nursery:
(1) Applicable tree species: larch, sylvestris pine, Korean pine, masson pine, foreign pine, black pine, cedar, spruce, fir, arborvitae, cypress and other coniferous species.
(2) Applicable dosage: 49~98 ml/mu.
(3) Time of use: after sowing, before emergence, and during the seedling stage.
(4) Usage: After sowing and before emergence, add 45 liters of water per acre and spray evenly. During the seedling stage, add 49 ml/acre of water to the stems and leaves 6 weeks after emergence.
(5) Soil conditions: The soil surface should be moist, and water should be taken during drought.
(6) Mixed use: Seedling stage treatment can be mixed with Napujing and Gaocaoneng.
(7) Precautions: Apply pesticide on calm or breezy days.
2. Newly sown broadleaf tree nursery:
(1) Applicable tree species: broad-leaved tree species such as ash, ginkgo, acacia, catalpa, sea buckthorn (except Russian large-fruited sea buckthorn).
(2) Applicable dosage: 39~40 ml/mu.
(3) Time of use: after sowing and before emergence.
(4) How to use: Mix 45 liters of water per acre and spray evenly.
(5) Soil conditions: The soil surface should be moist, and water should be taken during drought.
(6) Precautions: Apply pesticides on calm or breezy days.
3. Seedbed and changing bed conifer nursery:
(1) Applicable tree species: larch, sylvestris pine, Korean pine, masson pine, foreign pine, black pine, cedar, spruce, fir, arborvitae, cypress and other coniferous species.
(2) Applicable dosage: 49~98 ml/mu.
(3) Time of use: Before changing beds and in the seedling stage, before weeds sprout, it can be treated multiple times, once every 50 days.
(4) How to use: Mix 45 liters of water per acre and spray evenly.
(5) Soil conditions: Moist soil is conducive to the effectiveness of the medicine. Swimming is required during drought.
(6) Precautions: Apply pesticides on calm or breezy days.
4. Broad-leaved tree pole planting nursery:
(1) Applicable tree species: poplar, willow and other greening and afforestation pole species.
(2) Applicable dosage: 49~83 ml/mu.
(3) Time of use: Before or after the pole is inserted, before the buds open, or when the seedlings are higher than 80 cm, use inter-row directional spray.
(4) How to use: Mix 45 liters of water per acre and spray evenly.
(5) Soil conditions: The soil surface should be moist, and water should be taken during drought.
(6) Note: Do not spray after the buds open.
Main problems on crops of oxyfluorfen (42874-03-3)
1. Infiltration of pesticide damage After pre-emergence soil treatment, there is a sudden heavy rain during the crop emergence process. The pesticide on the soil surface penetrates into the young leaves that have not yet been unearthed, causing pesticide spots to appear on the crop seedlings. This occurs more frequently in peanuts and soybeans.
Second, if crops damaged by anti-munitions encounter heavy rain after they emerge, the raindrops falling to the ground will rebound the pesticide to the stems and leaves of the crops, causing spots on the crops and symptoms of "seedling burning". This is true for soybeans, peanuts, corn, and cotton. Have appeared.
3. Temperature phytotoxicity. If the weather suddenly turns sunny and the temperature rises rapidly when it is rainy after applying the medicine, the medicine will evaporate with the water vapor and damage the leaves of some crops. This has occurred on soybeans, peanuts, cotton, and corn.
4. Fumigation damage caused by fumigation. After transplanting some broad-leaf crops, the lower leaves will produce brown spots due to fumigation. This is more common in tobacco.
5. Flood irrigation in a short period of time after pesticide application or water accumulation in the field after rain can easily cause serious pesticide damage, especially in rice fields.
6. Weeding in protected areas caused by volatile pesticides. Due to poor ventilation, volatile pesticides accumulate in large quantities in greenhouses or sheds, causing crop burns.
In fact, these problems can be solved. As long as the techniques used are reasonable, the cultivation and management are proper, and preventive measures are taken, the crops can quickly resume growth without affecting the yield.
The difference between carboxyfluorfen and oxyfluorfen (42874-03-3)
1. Oxyfluorfen only has contact activity and no blocking activity (or in other words, the residual effect period is very short). Oxyfluorfen has both contact activity and blocking activity (longer half-life).
2. The post-emergence herbicidal activity of oxyfluorfen is much lower than that of carboxyfluorfen, so it is mainly used for sealing;
3. Due to its short residual effect and wide herbicidal spectrum, carboxyfluorfen is particularly effective against the glyphosate-resistant malignant weed Amaranth, so it can be used as an auxiliary to glyphosate in many places.
4. Many crops cannot be sown directly after the use of oxyfluorfen (residual period), so it is slightly unsuitable for use as oxyfluorfen. But if you promote one-letter-one-kill, it’s a bit good. It depends on the operation.
5. What they have in common: They all work in the presence of light.
Precautions for oxyfluorfen (42874-03-3)
The herbicide oxyfluorfen is used on rice, and improper application can easily cause phytotoxicity. When applied to paddy fields, the herbicide will settle on the soil surface within 24 hours after being applied to the water layer, and will soon be adsorbed in the 0 to 3 cm topsoil layer. , not easy to move vertically downward, and is decomposed into carbon dioxide by microorganisms in the soil within 3 weeks, with a half-life in the soil of about 30 days.
Special emphasis is placed on: pay attention to the application of strong seedlings that require the seedling height to be more than 20 cm and the seedling age to be more than 30 days. Pay attention to the air temperature and soil temperature conditions at that time. If the daily temperature is lower than 20°C and the soil temperature is lower than 15°C, the seedlings will be damaged. When the seedlings are too small, tender and are damaged by strong winds and heavy rains, the application of oxyfluorfen can easily cause phytotoxicity to the seedlings. When applying pesticides, pay attention to strictly controlling the dosage of oxyfluorfen and maintaining a shallow water layer in the field. Special attention should be paid to irrigation so that the center of the seedlings cannot be submerged. When the water layer in the field is too deep during heavy rain after applying pesticides, drainage should be done immediately to keep the water layer shallow to prevent the seedlings from being harmed by the pesticide. Therefore, do not use pesticides before the heavy rain comes.
At the 4-leaf stage of the seedlings, if the spraying amount exceeds the recommended amount, and the seedlings are young at that time, and the spraying method is used, if the spraying is uneven, it will easily cause phytotoxicity to the seedlings. Contact-type phytotoxicity spots will appear on the leaves of rice. The leaves of lightly damaged plants will turn yellow, and the severely damaged plants will die. The lightly damaged plants will generally recover gradually after a period of time, and ultimately the yield will be little affected. For rice damaged by oxyfluorfen, foliar fertilizers such as humic acid and potassium dihydrogen phosphate can be sprayed to promote growth recovery.
Herbicide oxyfluorfen (42874-03-3) price
Under normal circumstances, the price of the pesticide and herbicide oxyfluorfen will be affected by raw materials, market environment, research and development costs, etc. If you want to know the latest price of the pesticide and herbicide oxyfluorfen you need, please contact us to initiate an inquiry.
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